RSS Feed
Knowledgebase : EnergyPlus
The usual reason for these errors is that the partitions between "included" and "excluded" zones are modelled using adiabatic boundary condition, but some of these surfaces in the model have openings in them. EnergyPlus doesn't allow this. Zones are exc...
EnergyPlus doesn't calculate the global U-value of glazing + frame but you can use the "Simple" glazing definition method and enter combined glazing + frame U-value, SHGC and VT values. In this case it is important to avoid including the frame twice, so m...
When using calculated natural ventilation with very large airflow openings (relative to the size of the rest of the zone) an EnergyPlus error can occur: "Too many iterations (SOLVZP) in Airflow Network simulation" This is caused by EnergyPlus failing ...
In simulations, the surface fabric and solar heat transfer output is controlled by the Surface heat transfer incl solar output option. In versions 2.2 and later of DesignBuilder this output is now switched off by default to reduce the size of the output...
The simple glazing model works by taking a very basic description of the glazing system, then the surface (film) coefficients are stripped off and a match is made with some standard glazing system types, the parameters of these are adjusted through interp...
At the end of an EnergyPlus simulation DesignBuilder reads the EnergyPlus output file eplusout.eso. Much of the data is stored and displayed without further processing but in some cases the outputs are processed to ensure that they are consistent with the...
This warning will occur for partitions between 2 merged zones. Because of the merging, the zone is the same on both sides of the partition and EnergyPlus flags this as a potential mistake. To avoid this message, you can select the 'Surfaces within zone ...
Identifying surfacesThe first step is to search for the surface reference in the IDF data. For example if the error is related to surface 'W_21_4_0', search for this text. You should then find a definition for the surface, something like: ! Block 1, Z...
This advice refers to EnergyPlus v5 and earlier (DesignBuilder v.2.2 and earlier) - it should not be relevant to EnergyPlus v6 (DesignBuilder v2.3) and later which have fully extensible data. In some cases DOE versions of EnergyPlus cannot simulate the...
You can use DesignBuilder to generate EnergyPlus idf files for use in external simulation environments such as EP-Launch. There are 4 alternative procedures for doing this:1. From the File > Export menu option (recommended) 2. By copying the intermed...